2021-2022 PARUL University B.Tech Computer Organization Exam PDF

Seat No: ______________ Enrollment No: ____________________ PARUL UNIVERSITY FACULTY OF ENGINEERING & TECHNOLOGY B.Tech. Winter 2021 -22 Exami...

Seat No: ______________ Enrollment No: ____________________ PARUL UNIVERSITY FACULTY OF ENGINEERING & TECHNOLOGY B.Tech. Winter 2021 -22 Examination Semester: 3 Date: 04/10/2021 Subject Code: 203124209 Time: 02:00 pm to 04:30 pm Subject Name: Computer Organization and Microprocessor Architecture Total Marks: 60 Instructions: 1. All questions are compulsory. 2. Figures to the right indicate full marks. 3. Make suitable assumptions wherever necessary. 4. Start new question on new page. Q.1 Objective Type Questions - ( Fill in the blanks, one word answer, MCQ-not more than Five in (15) case of MCQ) (All are compulsory) (Each of one mark) 1 Which of the following is an interrupt of microprocessor 8085. A. CLK B. ALE C. SOD D. TRAP 2 Address range of memory , which can be connected with 8085 microprocessor is A. 0000 H-FFFF H B. 0000 H-1111 H C. 00 H-FF H D. 000 H-FFF H 3 The capacity of ALU in 8085 microprocessor is of A. 8 bit B. 6 bit C. 4 bit D. 16 bit 4 Program counter is used A. To store address of stack top C. to store the instruction B. To point the address of next instruction to be executed D. None of the above 5 Stack pointer is a A. 8 bit register C. 16 bit register B. 4 bit register D. None of above 6 Carry Flag indicates the status of 4 LSBS. –State True or False 7 S0 and S1 are the status pins of microprocessor. –State True or False 8 The instruction set of 8085 contains ________________basic instruction. 9 Instruction MOV A, B is ____________byte instruction. 10 STA address 16 bit instruction belongs to ______________addressing mode. 11 Stack memory is ____________type of memory. 12 ADC M is an example of ______________instruction. 13 1K X 8 memory IC have __________address line and __________data lines. 14 What is an interrupt? 15 Which is the nonmaskable interrupt in 8085 microprocessor. Q.2 Answer the following questions. (Attempt any three) (15) A) Indicate the status of each flag when microprocessor perform the following operation: (a) 96H + FF H (b) C1 H + 32H (c) D1 H + 33 H B) What do you mean by instruction format? Describe one byte, 2 byte and 3byte instruction s of 8085. C) Explain the addressing mode of following instructions. (a) LDA address (b) RAL (c) STA address (d) ADC M (e) LXI Rp , 16 bit D) What is a bus? Specify the function of the address bus, data bus and control bus. Q.3 A) How many registers are there in 8085 microprocessor? Explain the use of each register. (07) B) Draw interfacing diagram of connecting 4K byte static RAM (SRAM) with 8085 microprocessor (08) with memory map. Assume starting address to be 4000H. OR B) What is micro operation of computer system? Describe briefly four micro operations. (08) Q.4 A) Write a simple time delay program using a 8 bit register and register pair as a counter (07) OR A) Draw and explain the block diagram of 8085 showing clearly the internal architecture of the (07) CPU. B) Explain the operation of PUSH and POP instructions with diagram. (08) Page 1 of 1